25631212 has 12 divisors (see below), whose sum is σ = 44967160. Its totient is φ = 12783456.

The previous prime is 25631201. The next prime is 25631219. The reversal of 25631212 is 21213652.

It is not an unprimeable number, because it can be changed into a prime (25631219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6198 + ... + 9469.

Almost surely, 2^25631212 is an apocalyptic number.

It is an amenable number.

25631212 is a deficient number, since it is larger than the sum of its proper divisors (19335948).

25631212 is a wasteful number, since it uses less digits than its factorization.

25631212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16080 (or 16078 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 25631212 is about 5062.7277232733. The cubic root of 25631212 is about 294.8422483201.

Adding to 25631212 its reverse (21213652), we get a palindrome (46844864).

The spelling of 25631212 in words is "twenty-five million, six hundred thirty-one thousand, two hundred twelve".